#include <cs50.h>
#include <stdio.h>

int main () {
	int x, y;
	do {
		scanf("%d", &x);
	} while(x <= 0);

	switch (x / 10) {
		case 0:
		case 1:
			printf("y=1 \n"); break;
		case 2:
			printf("y=2 \n"); break;
		case 3:
			printf("y=3 \n"); break;
		case 4:
			printf("y=4 \n"); break;
		case 5:
			printf("y=5 \n"); break;
		default: 
			printf("y=6 \n"); break;
	}
}
